CN104006260B - Water lines current stabilization Broad Band Muffler - Google Patents
Water lines current stabilization Broad Band Muffler Download PDFInfo
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- CN104006260B CN104006260B CN201410249327.2A CN201410249327A CN104006260B CN 104006260 B CN104006260 B CN 104006260B CN 201410249327 A CN201410249327 A CN 201410249327A CN 104006260 B CN104006260 B CN 104006260B
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- perforated pipe
- pipe
- shunting
- water lines
- muffler
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/027—Throttle passages
- F16L55/02709—Throttle passages in the form of perforated plates
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
The invention discloses a kind of water lines current stabilization Broad Band Muffler, comprise conduit pipe and muffler shell, the muffler shell shell one end inner side surface being fixedly connected with conduit pipe is installed with expansion perforated pipe; End plate is fixedly installed in the other end position of described muffler shell; This end plate is also fixedly connected with shunting perforated pipe, is fixedly installed restrictor ring in the port position of this shunting perforated pipe the inner; The internal diameter of described expansion perforated pipe is greater than the external diameter of shunting perforated pipe, the inner of expansion perforated pipe interfixes with a gap be socketed with the inner of shunting perforated pipe, and the overflow section of described conduit pipe amasss and is less than end plate bore overflow section and amasss and amass sum with the overflow section shunting perforated pipe.The wide band that this current stabilization Broad Band Muffler can not only realize water lines is eliminated the noise, and effectively can stablize the flow field of water lines outlet end, reduces jet water stream speed and pressure, thus effectively reduces water lines port noise, achieves the effect of current stabilization and wide band noise elimination.
Description
Technical field
The present invention relates to a kind of noise elimination technique equipment, particularly relate to the silencing apparatus of water piping system hydrodynamic noise.
Background technique
In water piping system, the sudden change of pump, valve, elbow and channel cross-section all can produce flow dynamics noise, and this noise propagated by pipeline is decayed with the increase of propagation length hardly, finally from pipe end directly to external radiation, form serious radiated noise source.In addition, when the water in water lines flows out from the mouth of pipe, because outlet end flow field produces sudden change, water flows out with the form of jet flow, and the pulsation of jet water stream speed and jet pressures also can cause pipeline vibration and produce injection noise.Especially for narrow space in the ship such as boats and ships, submarine or the naval vessel with the requirement of other tactics technology, pipeline noise and tube opening noise thereof seem particularly outstanding.Therefore, for naval vessel, water lines noise not only affects the disguise of boats and ships and the safety reliability of equipment operation, and can produce considerable influence to marine acoustics environment.
Although waterpipe exists significant difference from the pressure pulsation in air conduit: first airborne noise and water noise have different media, the characteristic impedance of air dielectric and the characteristic impedance of water differ more than 3000 times; Next is usually used in sound absorption in air dielectric, sound insulating material is entrant sound substantially in liquid medium, also have the compressibility of air good, silencing apparatus in air mostly works at low pressures, and water lines silencing apparatus will bear very wide range of working pressure, therefore there is very large difference in water silencer and air silencer in noise elimination mechanism.Although developed comparatively ripe at air silencer, but people are relatively less to the research of water lines silencing apparatus, due to the difference of these two kinds of flowing medium character of water and air, the design method of air silencer can not be used for reference or indiscriminately imitate to the design of water lines silencing apparatus completely, therefore seems very necessary and urgent to the research of water lines silencing apparatus.
Chinese patent application 201310009357.1 discloses a kind of pressure self-balancing hydrodynamic noise device be serially connected with in water lines, it is set with barreled housing in the outside of perforation pipeline section, compressible spring member is filled with between perforation pipeline section and barreled housing, thus constitute an accumulator noise elimination structure, although this sound deadener can suppress pressure pulsation in pipeline, there is the effect reducing pipeline noise, but its noise elimination frequency band is narrower, be difficult to suppress wideband hydrodynamic noise, more can not stablize the injection flow field of tube outlet end, reduce port injection noise, and exactly the width of this port vibration & noise to penetrate efficiency high, the most direct on the disguise impact of environment and naval vessels.
Summary of the invention
For the above-mentioned deficiency existing for prior art, technical problem to be solved by this invention is to provide a kind of water lines current stabilization broadband muffler, the wide band that it can not only realize water lines is eliminated the noise, and effectively can stablize the flow field of water lines outlet end, reduce jet water stream speed and pressure, thus effectively reduce the quadratic noise of water lines port radiated noise and jet flow generation.
In order to solve the problems of the technologies described above, a kind of water lines current stabilization Broad Band Muffler of the present invention, comprise conduit pipe and muffler shell, this conduit pipe is fixedly connected on the housing of muffler shell through one end of muffler shell, the muffler shell shell one end inner side surface being fixedly connected with conduit pipe is installed with expansion perforated pipe, and the internal diameter of this expansion perforated pipe is greater than the external diameter of conduit pipe; Be fixedly installed end plate in the other end position of described muffler shell, this end plate is provided with end plate bore; This end plate is also fixedly connected with shunting perforated pipe, and this shunting perforated pipe stretches in the housing of muffler shell, is fixedly installed restrictor ring in the port position of this shunting perforated pipe the inner; The internal diameter of described expansion perforated pipe is greater than the external diameter of shunting perforated pipe, the inner of expansion perforated pipe interfixes with a gap be socketed with the inner of shunting perforated pipe, and the overflow section of described conduit pipe amasss and is less than end plate bore overflow section and amasss and amass sum with the overflow section shunting perforated pipe.
On described end plate, the overflow section of each end plate bore amasss sum and is more than or equal to shunting perforated pipe overflow section and amasss.
Described conduit pipe and expansion perforated pipe are circular pipe, and the internal diameter of this expansion perforated pipe is 1.5 ~ 2.0 with the ratio of the internal diameter of conduit pipe.
Described restrictor ring is circle structure, and described shunting perforated pipe is circular pipe, and the shunting internal diameter of perforated pipe is 1.5 ~ 2.0 with the ratio of the internal diameter of restrictor ring.
The inner of described expansion perforated pipe is interfixed with a gap by dunnage with the inner of shunting perforated pipe and is socketed.
The tube hub line of described conduit pipe, expansion perforated pipe and shunting perforated pipe is on same straight line.
The aperture of the expanding duct perforation on described expansion perforated pipe tube wall equals the aperture of the ram's horns perforation of shunting on perforated pipe tube wall;
On expansion perforated pipe, punching rate is 15%-30%; Punching rate on shunting perforated pipe is 15%-30%.
The aperture of described expanding duct perforation and ram's horns perforation is 6-20mm.
Described muffler shell comprises pipe section and ellipse head, and pipe section and ellipse head are tightly connected mutually.
In said structure, because the expansion perforated pipe and suppressor case sectional dimension that are fixedly installed in muffler shell case inside face are all greater than conduit pipe diameter, the runner entered along conduit pipe forms expansion structure, sound wave causes acoustic impedance sudden change in passage in the sudden expansion of this pipeline section, Acoustic Wave Propagation direction is changed, reflect in pipeline, interference phenomenon, thus effectively achieve the noise elimination of a Middle and low frequency noise.Again because expansion perforated pipe adopts tube wall perforation structure, acoustic energy is converted into heat energy and dissipates by the damping function of perforation, greatly reduces noise pulsation, and the perforation on expansion perforated pipe produces damping and achieves once noise elimination to high-frequency noise under fluid viscosity effect; And produce when system frequency is identical with noise frequency and resonate, sound energy consumption is maximum.Also owing to being provided with restrictor ring at the port of shunting perforated pipe, the runner expansion of shunting perforated pipe is entered on the one hand by restrictor ring, sudden expansion is there is again and causes acoustic impedance sudden change in this passage in sound wave at this pipeline section, again reflect at this pipeline, interference phenomenon, formed secondary Middle and low frequency noise eliminate the noise; The shunting action of restrictor ring on the other hand, current are forced to be shunted along the expanding duct perforation on expansion perforated pipe, expansion perforated pipe and the gap runner shunted between perforated pipe and restrictor ring endoporus runner respectively, the flow velocity of current is reduced greatly, water flow pressure reduces, and effectively suppresses the quadratic noise that jet flow produces.Again because shunting perforated pipe adopts tube wall perforation structure too, the damping function that it not only utilizes this tube wall to bore a hole reduces noise pulsation again, realizes eliminating the noise and resonant silencing to the secondary of high-frequency noise; And the perforation of this tube wall achieves the hydraulic balance of shunting perforated pipe tube wall both sides, water outlet current are more stable.After adopting said structure, the water velocity flowed out from shunting perforated pipe and end plate bore and bulk range are reducing greatly, and flow field obtains this and stablizes, and hydraulic pressure is stabilized, both significantly alleviate the injection noise of current fluid, avoid again the vibration & noise that water impact causes.Therefore the present invention adopts runner expansion, porous multichannel shunting principle generation steady flow condition, reduces water outlet port jet water stream speed and stream distance; Adopt acoustic reflection and small damping absorb sound principle, the Proper Match that utilization expansion, throttling, shunting, resonance and damping absorb sound, realizes wideband (50-10000Hz) soundproof effect; Adopt sudden expansion and throttling, tube wall to bore a hole and realize the sound deadening capacity of more than full frequency band 10dB under the size-constrained condition of profile.Owing to have employed the design of porous multichannel flow deviding type, not only can accomplish that flow resistance is low, effectively can also prevent the growth of marine growth and easy cleaning.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, water lines current stabilization Broad Band Muffler of the present invention is described in further detail.
Fig. 1 is the concrete structure schematic diagram of a kind of mode of execution of water lines current stabilization Broad Band Muffler of the present invention;
Fig. 2 is the structural representation expanding perforated pipe in structure shown in Fig. 1;
Fig. 3 is the structural representation shunting perforated pipe in structure shown in Fig. 1;
Fig. 4 is the structural representation of the end plates of structure shown in Fig. 1.
In figure, 1-adpting flange, 2-conduit pipe, 3-muffler shell, 4-expansion perforated pipe, the perforation of 5-expanding duct, 6-dunnage, 7-restrictor ring, 8-shunting perforated pipe, the perforation of 9-ram's horns, 10-end plate bore, 11-end plate, 12-end plate central hole.
Embodiment
In the water lines current stabilization Broad Band Muffler shown in Fig. 1, muffler shell 3 is made up of pipe section and ellipse head section, and pipe section and ellipse head are interfixed by welding and be sealed connected together; Certainly this muffler shell 3 also can be formed by global formation.One end of the conduit pipe 2 of circular tube structure is fixedly connected on the housing of muffler shell 3 through the ellipse head of muffler shell 3, and the other end of conduit pipe 2 is fixedly connected with adpting flange 1, to be installed in water lines by silencing apparatus.The case inside face that described muffler shell 3 is fixedly connected with ellipse head one end of conduit pipe is installed with expansion perforated pipe 4.As shown in Figure 2, this expansion perforated pipe 4 is circular tube structure, the tube wall of expansion perforated pipe 4 is provided with expanding duct perforation 5 that 112 apertures are diameter 15mm equably, the punching rate of expansion perforated pipe 4 is selected 15%-30%, the internal diameter of expansion perforated pipe 4 is greater than the internal diameter of conduit pipe 2, this expansion perforated pipe 4 internal diameter is 1.5-2.0 with the ratio prioritizing selection of conduit pipe 2 internal diameter, to form expansion structure at runner.
Be fixedly connected by welding in the other end position of muffler shell 3 end plate 11.As shown in Figure 4, end plate 11, in Circular plate structure, having the end plate central hole 12 for connecting shunting perforated pipe 8 at the home position of end plate 11, being circumferentially evenly distributed with the same of end plate plate face the end plate bore 10 that 12 diameters are 30mm.End plate 11 is welded with shunting perforated pipe 8, this shunting perforated pipe 8 stretches in the housing of muffler shell 3; As shown in Figure 3, shunting perforated pipe 8 is also circular tube structure, and it is also the ram's horns perforation 9 of diameter 15mm that the tube wall of shunting perforated pipe 8 is provided with 16 apertures equably, and its punching rate is also selected 15%-30%.The port position of stretching to shell one end at shunting perforated pipe 9 is fixedly installed restrictor ring 7, and restrictor ring 7 adopts circle structure, and its external diameter adapts with the internal diameter of shunting perforated pipe 9, and internal diameter is runner circular hole.Consider the shunting action of restrictor ring 7 and the expansion structure of runner, the shunting internal diameter of perforated pipe 8 is preferably chosen as 1.5-2.0 with the ratio of the internal diameter of restrictor ring 7.The internal diameter of expansion perforated pipe 4 is greater than the external diameter of shunting perforated pipe 8, the inner expanding perforated pipe 4 can be socketed with a gap mutually with the inner of shunting perforated pipe 8, the inner of expansion perforated pipe 4 and the inner of shunting perforated pipe 8 make both mutually fixedly sleeved with a gap by the dunnage 6 of three tabulars, thus form runner in this gap.
In order to realize current stabilization and stabilize water flow pressure, reduce jet water stream speed and bulk range, the overflow section for the conduit pipe 2 of intaking amasss the overflow section being less than end plate bore 10 and amasss and amass sum with the overflow section shunting perforated pipe 2; In order to ensure current from muffler outlet end even flow out, on end plate 11 overflow section of each end plate bore 10 amass sum be greater than or equal to shunting perforated pipe 8 overflow section amass.In this enforcement, the overflow section of conduit pipe 2 amasss cross-section area in the pipe into conduit pipe, and it is also cross-section area in the pipe of shunting perforated pipe that the overflow section of shunting perforated pipe 8 amasss, and the overflow section of end plate bore 10 amasss the hole area into end plate bore.The tube hub line of the conduit pipe 2 in circular tube structure, expansion perforated pipe 4 and shunting perforated pipe 8 is all on same straight line, to reduce flow passage resistance force of waterproof, and balanced runner flow velocity.The aperture prioritizing selection of expanding duct perforation 5 and ram's horns perforation 9 is 6-20mm.
Claims (10)
1. a water lines current stabilization Broad Band Muffler, comprise conduit pipe (2) and muffler shell (3), this conduit pipe (2) is fixedly connected on the housing of muffler shell (3) through one end of muffler shell (3), it is characterized in that: muffler shell (3) the shell one end inner side surface being fixedly connected with conduit pipe (2) is installed with expansion perforated pipe (4), and the internal diameter of this expansion perforated pipe (4) is greater than the external diameter of conduit pipe (2); Be fixedly installed end plate (11) in the other end position of described muffler shell (3), this end plate (11) be provided with end plate bore (10); This end plate (11) is also fixedly connected with shunting perforated pipe (8), and this shunting perforated pipe (8) stretches in the housing of muffler shell (3), and the port position inner at this shunting perforated pipe (8) is fixedly installed restrictor ring (7); The internal diameter of described expansion perforated pipe (4) is greater than the external diameter of shunting perforated pipe (8), the inner of expansion perforated pipe (4) and the inner of shunting perforated pipe (8) interfix with a gap and are socketed, and the long-pending long-pending overflow section with shunting perforated pipe (8) of end plate bore (10) overflow section that is less than of the overflow section of described conduit pipe (2) amasss sum.
2. described water lines current stabilization Broad Band Muffler according to claim 1, is characterized in that: the overflow section of the upper each end plate bore (10) of described end plate (11) amasss sum and is more than or equal to shunting perforated pipe (8) overflow section and amasss.
3. described water lines current stabilization Broad Band Muffler according to claim 1, it is characterized in that: described conduit pipe (2) and expansion perforated pipe (4) are circular pipe, and the ratio of the internal diameter of this expansion perforated pipe (4) and the internal diameter of conduit pipe (2) is 1.5 ~ 2.0.
4. described water lines current stabilization Broad Band Muffler according to claim 1, it is characterized in that: described restrictor ring (7) is circle structure, described shunting perforated pipe (8) is circular pipe, and the ratio of the internal diameter of shunting perforated pipe (8) and the internal diameter of restrictor ring (7) is 1.5 ~ 2.0.
5. described water lines current stabilization Broad Band Muffler according to claim 1, is characterized in that: the inner of described expansion perforated pipe (4) and the inner of shunting perforated pipe (8) are interfixed with a gap by dunnage (6) and be socketed.
6. the water lines current stabilization Broad Band Muffler according to any one of Claims 1 to 5, is characterized in that: conduit pipe (2), expansion perforated pipe (4) and shunt perforated pipe (8) tube hub line be on same straight line.
7. the water lines current stabilization Broad Band Muffler described in any one of Claims 1 to 5, is characterized in that: the aperture of expanding duct perforation (5) on described expansion perforated pipe (4) tube wall equals the aperture of ram's horns perforation (9) shunted on perforated pipe (8) tube wall.
8. described water lines current stabilization Broad Band Muffler according to claim 7, is characterized in that: the upper punching rate of expansion perforated pipe (4) is 15%-30%; Punching rate in shunting perforated pipe (8) is 15%-30%.
9. described water lines current stabilization Broad Band Muffler according to claim 7, is characterized in that: the aperture of described expanding duct perforation (5) and ram's horns perforation (9) is 6-20mm.
10. the water lines current stabilization Broad Band Muffler described in any one of Claims 1 to 5, is characterized in that: described muffler shell (3) comprises pipe section and ellipse head, and pipe section and ellipse head are tightly connected mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410249327.2A CN104006260B (en) | 2014-06-09 | 2014-06-09 | Water lines current stabilization Broad Band Muffler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410249327.2A CN104006260B (en) | 2014-06-09 | 2014-06-09 | Water lines current stabilization Broad Band Muffler |
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| CN104006260A CN104006260A (en) | 2014-08-27 |
| CN104006260B true CN104006260B (en) | 2016-02-24 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989869A (en) * | 2015-07-08 | 2015-10-21 | 中国船舶重工集团公司第七一九研究所 | Water pipe noise elimination and flow rectifier |
| CN107890000A (en) * | 2017-12-25 | 2018-04-10 | 贵州山王果健康实业有限公司 | A kind of Rosa roxburghi Juice sterilization fresh-keeping mechanism |
| CN108974305B (en) * | 2018-06-27 | 2020-06-30 | 中国船舶重工集团公司第七一九研究所 | Resonance silencing inter-board flow channel |
| CN113617073B (en) * | 2021-07-26 | 2022-07-26 | 淮北市中芬矿山机器有限责任公司 | Efficient flow stabilizing barrel with feeding assisting function and using method thereof |
| CN114110291B (en) * | 2021-11-24 | 2023-09-19 | 江苏科技大学 | Elastic plate type straight-through perforated pipe water muffler with static pressure balance cavity and assembly method |
| CN114396523B (en) * | 2022-02-24 | 2024-05-03 | 中国人民解放军海军工程大学 | Active and passive composite muffler for liquid filling pipeline |
| CN114310621B (en) * | 2022-03-04 | 2022-05-13 | 沈阳和研科技有限公司 | Side water spray part, water spray cover and dicing saw |
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| US3470979A (en) * | 1967-10-10 | 1969-10-07 | Wilhelm S Everett | Fluid pulsation dampener with thimble |
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